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Accident
Last updated: 12 December 2017
Statuts:Enquête Officielle
Date:vendredi 19 août 1994
Heure:13:08
Type/Sous-type:Silhouette image of generic MD11 model; specific model in this crash may look slightly different
McDonnell Douglas MD-11C
Compagnie:Alitalia
Immatriculation: I-DUPO
Numéro de série: 48429/500
Année de Fabrication: 1992
Heures de vol:9390
Moteurs: 3 General Electric CF6-80C2D1F
Equipage:victimes: 0 / à bord: 14
Passagers:victimes: 0 / à bord: 253
Total:victimes: 0 / à bord: 267
Dégats de l'appareil: Mineurs
Conséquences: Repaired
Lieu de l'accident:Chicago-O'Hare International Airport, IL (ORD) (   Etats-Unis d'Amérique)
Phase de vol: A l'atterrissage (LDG)
Nature:Transport de Passagers Intern.
Aéroport de départ:Roma-Fiumicino Airport (FCO/LIRF), Italie
Aéroport de destination:Chicago-O'Hare International Airport, IL (ORD/KORD), Etats-Unis d'Amérique
Numéro de vol:AZ664
Détails:
An Alitalia MD-11 passenger plane, registered I-DUPO, was damaged in a landing incident at Chicago-O'Hare International Airport, IL (ORD), USA. There were no injuries to the 14 crewmembers or 253 passengers.
The airplane was cleared for and flew an instrument landing system (ILS) approach to runway 22R, at ORD. The pilot flying was the first officer. He flew the airplane throughout the entire approach and landing on runway 22R. He had been flying for 10 hours and this was the only landing he made during the flight.
The airplane experienced a hard landing on initial touchdown. Subsequently, the nose tires failed, damage occurred to the general area of the nose landing gear support structure, and there was foreign object damage to the #1 and #3 engines. The flight data recorder (FDR) data indicated that the initial touchdown acceleration had a value of 1.9488 g's. Also, the fdr revealed that after touchdown, the airplane experienced four oscillations in the pitch axis. The maximum pitch angle during this time was +5.98 degrees nose up, and the minimum value was -2.46 degrees nose down. During this time frame, spoiler positions never exceeded 8.0 degrees of deflection and the nose weight on wheels parameter changed four times.

Probable Cause:

PROBABLE CAUSE: "The first officer's improper flare and improper use of flight controls during the landing flare/touchdown."

Sources:
» NTSB


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Plan
Ce plan montre l'aéroport de départ ainsi que la supposée destination du vol. La ligne fixe reliant les deux aéroports n'est pas le plan de vol exact.
La distance entre Roma-Fiumicino Airport et Chicago-O'Hare International Airport, IL est de 7689 km (4805 miles).

Les informations ci-dessus ne représentent pas l'opinion de la 'Flight Safety Foundation' ou de 'Aviation Safety Network' sur les causes de l'accident. Ces informations prélimimaires sont basées sur les faits tel qu'ils sont connus à ce jour.
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